| # Copyright 2017 The Bazel Authors. All rights reserved. |
| # |
| # Licensed under the Apache License, Version 2.0 (the "License"); |
| # you may not use this file except in compliance with the License. |
| # You may obtain a copy of the License at |
| # |
| # http://www.apache.org/licenses/LICENSE-2.0 |
| # |
| # Unless required by applicable law or agreed to in writing, software |
| # distributed under the License is distributed on an "AS IS" BASIS, |
| # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| # See the License for the specific language governing permissions and |
| # limitations under the License. |
| |
| """Skylib module containing functions that operate on dictionaries.""" |
| |
| def _add(*dictionaries): |
| """Returns a new `dict` that has all the entries of the given dictionaries. |
| |
| If the same key is present in more than one of the input dictionaries, the |
| last of them in the argument list overrides any earlier ones. |
| |
| This function is designed to take zero or one arguments as well as multiple |
| dictionaries, so that it follows arithmetic identities and callers can avoid |
| special cases for their inputs: the sum of zero dictionaries is the empty |
| dictionary, and the sum of a single dictionary is a copy of itself. |
| |
| Args: |
| *dictionaries: Zero or more dictionaries to be added. |
| |
| Returns: |
| A new `dict` that has all the entries of the given dictionaries. |
| """ |
| result = {} |
| for d in dictionaries: |
| result.update(d) |
| return result |
| |
| dicts = struct( |
| add = _add, |
| ) |
